What term best describes the phenomenon of light pollution caused by the scattering of artificial light in the night sky?

The term that best describes the phenomenon of light pollution caused by the scattering of artificial light in the night sky is "sky glow." This occurs when artificial light, such as that from streetlights, buildings, and advertising, radiates upward and scatters in the atmosphere, which then creates a brightening of the night sky over populated areas.

Sky glow can significantly affect astronomical observations, as it diminishes the visibility of stars and celestial bodies, leading to a reduction in the quality of night sky observation. This phenomenon impacts not only astronomy but can also have ecological consequences, influencing nocturnal wildlife and disrupting their natural behaviors.

The other terms, such as glare, trespass, and ambient light, refer to different aspects of light or light pollution. Glare typically describes excessive brightness that creates visual discomfort, while trespass relates to unwanted light intrusion into spaces where it is not desired. Ambient light refers to general illumination in an environment and does not capture the specific issue of artificial light scattering in the night sky like sky glow does.